I think it is possible to take good care of sacred things without giving the appearance of extreme scrupulosity. The sacrarium assists with this:

§ 236 § The sacristy near the sanctuary will usually contain the sacrarium, the special sink used for the reverent disposal of sacred substances. This sink has a cover, a basin, and a special pipe and drain that empty directly into the earth, rather than into the sewer system. After Mass, when the vessels are rinsed and cleansed, the water is poured into the sacrarium so that any remaining particles that might be left will not be poured into the sewer but will go directly into the earth. When the purificators and corporals are rinsed before being washed, the water is disposed of in the sacrarium. The sacrarium also can be used to discard old baptismal water, left-over ashes, and the previous year’s oils, if they are not burned.

§ 237 § In addition, if any of the Precious Blood is accidentally spilled during Mass, it is carefully wiped up and the area is washed. The water from this process also should be poured down the sacrarium. Reverence for sacred things continues even after they are no longer useful in the liturgy.

Please plan the sacrarium carefully: not draining into the lowest spot on the church campus.